CN110545019A - shafting alignment process method under three-support double-rotor high-rotating-speed - Google Patents
shafting alignment process method under three-support double-rotor high-rotating-speed Download PDFInfo
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- CN110545019A CN110545019A CN201910905154.8A CN201910905154A CN110545019A CN 110545019 A CN110545019 A CN 110545019A CN 201910905154 A CN201910905154 A CN 201910905154A CN 110545019 A CN110545019 A CN 110545019A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a shafting alignment process method under high rotating speed of a three-support double-rotor, which adopts a shafting alignment method of 'step-by-step adjustment of a large rotor and a small rotor and pre-deflection', namely, firstly, horizontal adjustment and large rotor arrangement of large sliding bearings on two sides of the large rotor are carried out, then, the small rotor is in butt joint with the large rotor, the shaking of a sliding bearing gear of the small rotor is corrected, then, horizontal adjustment and arrangement of a small sliding bearing at the end of the small rotor are carried out, then, pre-deflection padding height arrangement is carried out at the position of the small sliding bearing, and finally, motor test run is carried out, including dynamic balance, overspeed and general assembly tests, so as to further carry out fine adjustment on the pre-deflection padding height, thereby stabilizing a.
Description
Technical Field
The invention relates to a shafting alignment process method under the high rotating speed of three-support double-rotor in the field of motor assembly.
background
The three-support double-rotor motor adopts a structure that two rotors are butted and supported by three sliding bearings. The structure has strict requirements on the stability of the motor, for example, a certain type of motor requires that the shaft vibration of the motor is less than 40 mu m in the rotating speed range of 3120r/min-4800r/min, and the motor is required to be overspeed to 5545r/min for 2 min.
If the rotor is supported by two sliding bearings, the center heights of the two sliding bearings are required to be adjusted to be consistent (horizontal), the rotor is placed on the two sliding bearings, and dynamic balance, overspeed, general assembly tests and the like are performed. For the rotors supported by the three sliding bearings, if the center heights of the three sliding bearings are adjusted to the same level according to a supporting method of the two sliding bearings, and the two butted rotors are placed on the three sliding bearings for dynamic balance, overspeed, general assembly tests and the like, the vibration of the small rotor is difficult to adjust, and effective shock absorption cannot be realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a shafting alignment process method under the high rotating speed of a three-support double-rotor motor, and can realize shafting alignment of the three-support double-rotor motor.
One technical scheme for achieving the above purpose is as follows: a shafting alignment process method under three-support birotor high-speed is to realize the alignment to three-bearing birotor motor, wherein three-bearing birotor motor includes big rotor and little rotor, its characterized in that, includes the following steps:
Step 1, horizontally correcting the two large sliding bearings, and then placing two ends of a large rotor on the two large sliding bearings;
step 2, connecting one end of the small rotor with the excitation end of the large rotor, and suspending the other end of the small rotor;
step 3, the large rotor is coiled to correct the shaking of the sliding bearing gear of the small rotor, the shaking is required to be not more than 0.05mm, and the large rotor and the small rotor are qualified in butt joint after the shaking is within the range;
Step 4, placing the sliding bearing block of the small rotor on the lower bearing bush of the small sliding bearing, placing the frame type level meter on the inner side close to the small sliding bearing, calibrating the level of the small rotor shaft system, and adjusting the height of the small sliding bearing by drawing out or padding a gasket under the bearing seat of the small sliding bearing, thereby adjusting the level of the small rotor shaft system;
step 5, after the small rotor shaft system is leveled, a pre-biased gasket is arranged below the small sliding bearing seat, so that the shaft system has a slight upward tilting trend from the butt joint of the small rotor and the big rotor to the sliding bearing gear direction of the small rotor;
And 6, mounting and testing the motor, performing a dynamic balance vibration reduction test, and increasing and decreasing the pre-biased gasket according to a dynamic balance test result so that the dynamic balance vibration reduction test result meets the requirement.
further, the large sliding bearing is a phi 200 bearing, and the small sliding bearing is a phi 100 bearing.
further, the pre-biased gasket set in step 5 is a detachable insert-type gasket, and the initial thickness of the pre-biased gasket is 0.8 mm.
the invention relates to a shafting alignment process method under high rotating speed of a three-support double-rotor, which adopts a shafting alignment method of 'step-by-step adjustment of a large rotor and a small rotor and pre-deflection', namely, firstly, horizontal adjustment and large rotor arrangement of large sliding bearings on two sides of the large rotor are carried out, then, the small rotor is in butt joint with the large rotor, the shaking of a sliding bearing gear of the small rotor is corrected, then, horizontal adjustment and arrangement of a small sliding bearing at the end of the small rotor are carried out, then, pre-deflection padding height arrangement is carried out at the position of the small sliding bearing, and finally, motor test run is carried out, including dynamic balance, overspeed and general assembly tests, so as to further carry out fine adjustment on the pre-deflection padding height, thereby.
Drawings
Fig. 1 is a schematic structural diagram of a three-support double-rotor motor corresponding to the three-support double-rotor high-speed lower shafting alignment process method of the invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:
Referring to fig. 1, the three-support dual-rotor motor corresponding to the three-support dual-rotor high-speed lower shafting alignment process of the present invention includes a large rotor 1, a small rotor 2, two large sliding bearings 3 and a small sliding bearing 4. Wherein the large sliding bearing 3 is a phi 200 bearing and the small sliding bearing 4 is a phi 100 bearing.
The invention relates to a shafting alignment process method under the high rotating speed of a three-support double-rotor, which comprises the following specific steps:
step 1, horizontally correcting the two large sliding bearings, and then placing two ends of a large rotor on the two large sliding bearings;
step 2, connecting one end of the small rotor with the excitation end of the large rotor, and suspending the other end of the small rotor;
Step 3, the large rotor is coiled to correct the shaking of the sliding bearing gear of the small rotor, the shaking is required to be not more than 0.05mm, and the large rotor and the small rotor are qualified in butt joint after the shaking is within the range;
Step 4, placing the sliding bearing block of the small rotor on the lower bearing bush of the small sliding bearing, placing the frame type level meter on the inner side close to the small sliding bearing, calibrating the level of the small rotor shaft system, and adjusting the height of the small sliding bearing by drawing out or padding a gasket under the bearing seat of the small sliding bearing, thereby adjusting the level of the small rotor shaft system;
step 5, after the small rotor shaft system is leveled, a pre-biased gasket is arranged below the small sliding bearing seat, so that the shaft system has a slight upward tilting trend from the butt joint of the small rotor and the big rotor to the sliding bearing gear direction of the small rotor;
and 6, mounting and testing the motor, performing a dynamic balance vibration reduction test, and increasing and decreasing the pre-biased gasket according to a dynamic balance test result so that the dynamic balance vibration reduction test result meets the requirement.
wherein, the pre-biased gasket set in step 5 is a detachable insert-type gasket, and the initial thickness of the pre-biased gasket is 0.8 mm. The specific thickness of the pre-biased spacer below the small sliding bearing seat after the small rotor shafting is horizontal is determined according to the condition of correcting dynamic balance, or the number of the spacers is increased or decreased. And when the rotor of each motor is subjected to sequential assembly of the dynamic balance calibration and the overspeed in an overspeed room, the motor is subjected to final assembly test in a company and is installed and debugged on site, and the lower gasket of the sliding bearing seat is increased or reduced according to the vibration reduction condition of the dynamic balance calibration.
Two sliding bearings supporting one rotor must be calibrated in height and must be consistent, three sliding bearings support two butted rotors, since the mass of the large rotor (8560kg) is about 13 times greater than the mass of the small rotor (670kg), the large rotor is actually bent when it rests on two large sliding bearings, namely, the middle of the big rotor slightly droops, the two ends of the big rotor slightly upwarps, and the big rotor also takes on the state when the rotor rotates, the small rotor abutting against one end face of the large rotor has small mass, only 1/12-1/13 of the mass of the large rotor, when rotating, the end face of the big rotor is also tilted upwards along with the tilting direction, so that the bearing gear of the small rotor is slightly higher than that of the horizontal rotor, and the small sliding bearing lower pad gasket raises the center of the small sliding bearing, so that the small sliding bearing lower pad is just suitable for the upwarping state of a small rotor bearing stop, and is favorable for correcting balance and reducing vibration. In overspeed room row assembly, motor final assembly and test run after field installation, because the level of foundation or chassis is different, the actual lifting of small sliding bearing is different, and need be decided according to the dynamic balance condition.
it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (3)
1. A shafting alignment process method under three-support birotor high-speed is to realize the alignment to three-bearing birotor motor, wherein three-bearing birotor motor includes big rotor and little rotor, its characterized in that, includes the following steps:
Step 1, horizontally correcting the two large sliding bearings, and then placing two ends of a large rotor on the two large sliding bearings;
step 2, connecting one end of the small rotor with the excitation end of the large rotor, and suspending the other end of the small rotor;
step 3, the large rotor is coiled to correct the shaking of the sliding bearing gear of the small rotor, the shaking is required to be not more than 0.05mm, and the large rotor and the small rotor are qualified in butt joint after the shaking is within the range;
Step 4, placing the sliding bearing block of the small rotor on the lower bearing bush of the small sliding bearing, placing the frame type level meter on the inner side close to the small sliding bearing, calibrating the level of the small rotor shaft system, and adjusting the height of the small sliding bearing by drawing out or padding a gasket under the bearing seat of the small sliding bearing, thereby adjusting the level of the small rotor shaft system;
step 5, after the small rotor shaft system is leveled, a pre-biased gasket is arranged below the small sliding bearing seat, so that the shaft system has a slight upward tilting trend from the butt joint of the small rotor and the big rotor to the sliding bearing gear direction of the small rotor;
and 6, mounting and testing the motor, performing a dynamic balance vibration reduction test, and increasing and decreasing the pre-biased gasket according to a dynamic balance test result so that the dynamic balance vibration reduction test result meets the requirement.
2. The method as claimed in claim 1, wherein the large sliding bearing is a phi 200 bearing, and the small sliding bearing is a phi 100 bearing.
3. The method as claimed in claim 1, wherein the pre-biased spacer set in step 5 is a detachable insert spacer with an initial thickness of 0.8 mm.
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| CN201910905154.8A CN110545019B (en) | 2019-09-24 | 2019-09-24 | Shafting alignment process method under three-support double-rotor high-rotating-speed |
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| CN201910905154.8A CN110545019B (en) | 2019-09-24 | 2019-09-24 | Shafting alignment process method under three-support double-rotor high-rotating-speed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122084A (en) * | 2019-12-30 | 2020-05-08 | 清华大学 | Crankshaft vibration testing device and method |
| CN115284073A (en) * | 2022-07-26 | 2022-11-04 | 武汉重型机床集团有限公司 | Dynamic balance measuring device and method for three-point support of spindle milling transmission shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122084A (en) * | 2019-12-30 | 2020-05-08 | 清华大学 | Crankshaft vibration testing device and method |
| CN115284073A (en) * | 2022-07-26 | 2022-11-04 | 武汉重型机床集团有限公司 | Dynamic balance measuring device and method for three-point support of spindle milling transmission shaft |
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| CN110545019B (en) | 2021-04-16 |
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